The Hyphessobrycon notidanos lives in the benthopelagic, freshwater environment.
Hyphessobrycon notidanos is distinguished from its congeners by the
combination of an elongate dorsal fin in mature males, a vertically
elongate humeral spot, 2-4 maxillary teeth, iii,8 dorsal-fin rays, and
16 to 21 branched anal-fin rays. More
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